Alloy



1 proportioned Patented Oct. 4, 1927.

UNITED STA TES PATENT OFFICE.

A. GEA'ITY, OF ELKRIDGE, MARYLAND.

ALLOY.

No Drawing.

ings most frequently used for this purpose are some form of fabricfrequently contaming a. wire mesh foundation, although leather and woodare also used for such linings; Such linings are open to the objectionsthat.

they quickly become burnt or glazed under are hygroscopic and expand andcontract with the changesln atconditions of use,

'mospheric conditions, and tend to slip when wet or oily. Furthermore,continuous appli cation of such brakes results in heating the drum andcausing the brakes to grip.

Metal linings have been proposed purpose but those found deficient inbraking efiect or subject for the to the same objections as the' fabriclinings,

hitherto used have been.

Application flled April 14, 1 925. Serial No. 23,088.

For this purpose I have found that the alloy should contain certainmetals having no chemical afiinity and that an alloy of lead, antimonyand copper to which has been added a certain proportion of sulphur makesan excellent material for the purpose. I

,have' also found that the lead should be I have found, however, that aproperly alloy may be free from the objections inherent'to' the fabric,leather or wood linings and which will have ample braking effect when inuse.

be made which will One, important object of the present in vention,therefore,'lies in the production of an 1 improvedv alloy especiallyadapted for.

use in connection with brakes, transmission bands and the like as alining or work-en gaging surface therefor.

A second important object of the invention is the production of animproved alloy for these purposes which may be rolled to form with greatease i's capable of being machined without difiiculty, has a properrigidity to prevent its buckling when riveted to the band, and does notreadily wear under conditions-ofu'se'. I

It is also to be noted that, due to the long life of the lining thusmade much of the constant adjustment needed with the usual type of brakelinings is eliminated and greater safety in the operation of automobilesand the like is, assured.

pounds of sulphur.

largely in excess of the other constituents and that an alloy, containinby weight 95% 'of lead 3% of antimony an 2% of copper,

to which is added 5% by weight of sulphur is most suitable for use as alining for brake bands although these proportions may be varied somewhatin accordance with the particular use for which the lining is intended.

- To make this alloy I preferably fuse together 95 pounds of lead, 3'pounds of antimony and 2 pounds 'ofcopper and then add to the fused andthoroughly mixed mass 5 may then be cast into ingots and rolled orextruded to the desired cross section.

1 The alloy thus made is formed to meet all the requirements for use asa lining for brake bands, transmissions and the like.

' Having thus described the invention, what is claimed-as new, is:

1. An alloy for linings for brake bands and the like containing byweight lead 95% antimony 3% and copper 2%.v

'2. An alloy for linings for brake bands and the like and containinglead, antimony,

copper and sul hur in the proportions of 95 pounds of ead, three poun sof anti- The mass thus formed mony, two pounds of copper and 5, poundsof sul hur.

3. 11 alloy for linings for brake bands .and the like containing lead,antimony, copper and sulphur, the lead constituting at least nine-tenthsof the entire alloy by weight, the weight of the sulphur beingsubstantially that of the antimony and copper and the weight of theantimon being slight-i ly in excess of the weight of t e copper.

In testimony whereof I aflix my signature.

CHARLES A. GEATTY.-

